using System;

public class Program

{

    public static void Main()

    {

     String str = "",reverse ="";

        int Length = 4;

        Console.WriteLine("Enter a word");

        str = Console.ReadLine();

        Length = str.Length - 1;

        while(Length>=0);

        {

            reverse = reverse + str[Length];

            Length --;

    }

        Console.WriteLine("reverse word is {4}",reverse);

}

}